Change login URL and fix basic auth

Author: Haarolean

api/src/main/java/io/kafbat/ui/config/auth/BasicAuthSecurityConfig.java

@@ -22,7 +22,8 @@
 @Slf4j
 public class BasicAuthSecurityConfig extends AbstractAuthSecurityConfig {
 
-  public static final String LOGOUT_URL = "/auth?logout";
+  private static final String LOGIN_URL = "/login";
+  private static final String LOGOUT_URL = "/auth?logout";
 
   @Bean
   public SecurityWebFilterChain configure(ServerHttpSecurity http) {
@@ -40,6 +41,10 @@ public SecurityWebFilterChain configure(ServerHttpSecurity http) {
             .anyExchange()
             .authenticated()
         )
+        .formLogin(form -> form
+            .loginPage(LOGIN_URL)
+            .authenticationSuccessHandler(authHandler)
+        )
         .logout(spec -> spec
             .logoutSuccessHandler(logoutSuccessHandler)
             .requiresLogout(ServerWebExchangeMatchers.pathMatchers(HttpMethod.GET, "/logout")))

contract/src/main/resources/swagger/kafbat-ui-api.yaml

@@ -2254,7 +2254,7 @@ paths:
               schema:
                 $ref: '#/components/schemas/AppAuthenticationSettings'
 
-  /auth:
+  /login:
     post:
       summary: Authenticate
       requestBody: